How big can you build a 500 engine

[Quad32x]

I know it may sound crazy but how much bigger can can you go on the LT 500 engine. Are there big bore kits or strokers that can be built ? Thanks for any info !!

[Banshee]

I've heard of 560's but I think big bore's are a bad Idea on the 500 because it just gets more unreliable. I would get some good porting done.

[sblt500r]

the stock sleave can be bored to .140 over, to what ever that equals out to be.

why would you need it any bigger?

[Quad32x]

The bigger the better ! Really I just wanted to find out cause Im always reading stuff about the big bores and strokers on other bikes. Just want to know whats out there !

[Zilladude]

Dr Q is building a 650cc Zilla motor (he actually has a few built already) 4mil stroker with a 97mm bore.

[Quad32x]

Could you give me any more info ? Thanks !

[Kane]

I think the only way I'd be interested in a bigger kit is right after Goki introduces the electric start kit. It's already a pig to kick over, imagine 650cc......

[Banshee]

I always thought the Zilla needs one of those starters that the indy cars use. That would be sweet.

[flotek]

if you want more power then porting is the way to go ,a dune ported 499c jug will absolutly crush a stock ported .140 overbored or whatever big bore it is . you can make a zilla have 75+ hp with drag porting add in some booze maybe 90hp ,but to be reliable and functional i wouldnt even think of a stroker , big bore kit or full-drag porting on a lt500, id get some decent dune porting and a nice exhaust/intake combo and a lightened flywheel and youll have more power than youll ever be able to recreationally use probably easily 60-65hp .

[ReeperLT500]

Originally Posted by Quad32x

I know it may sound crazy but how much bigger can can you go on the LT 500 engine. Are there big bore kits or strokers that can be built ? Thanks for any info !!

Hey there Quad32x. This is Old_School from atvflorida. This is my where I spend most of my time when it comes to quads. Gotta stick to my 2 stroke roots.

I think .140 over is around 540cc. I'm sure that wouldn't be fun kicking that over. lol. But I would do what eviltwin said. Port it with a top end pipe and that thing would scream. -Mark